mo wane



July 2, 1929. J. R. MCWANE MEANS FOR SUPPORTING CORE BARS IN FLASKS Original Filed Dec. l2,

1924 :5 Sheets-Sheet 1 July 2, 1929. W J, RJMCWANE MEANS FOR SUPPORTING com: ans IN FLASKS :s sHeets-sheet 2 Original Filed Dec.'l2 1924 Wm M July 2, '1929. "J.R.MCW NE Re. 17,362

MEANS FOR SUPPORTING CORE BARS IN FLASKS Original Filed Dec. 12, 1924 3 Sheets-Sheet 5 NI'IIINWRN Reissue d July 2, 1929.

UNITED STATES j Re. 17,362 PATENT. orries.

JAMES Mc'wANn-on BIRMINGHAM, ALABAMA, AssiGNoR To MGWANE CAST" IRON PIPE COMPANYQOF BIRMINGHAM, ALABAMA, A CORPORATION OF A ABAMA- MnANsFoR SUPPORTING :c'onn BAns'IN FIASKS.

Original No. 1,578,083,. dated March 23, 1926, Sria1 No. 755,512, filed December 12, 1924. Application for reissuefiled March 21, 1928. vSerial No. 263,486. i

DIVISION A.

. pipe or analogous castings by the horizontal method, wherein the flasks are placed onthe molding floor in horizontal position for the reception of the molten metal, andv wherein it is necessary that the core bar, together with the sand core thereon, shall occupy a true ooaxial position in the mold throughout its length, In order to secure a casting of unlform thickness.

Another object'is to provide means for this purpose that shall firmly grip the core bar near the ends of the-mold, and to resist-sagging of the intermediate portion of the core bar and core due to the weight thereof, and also to resist any rising movement of theinteri'nediate portion of the core bar due to the floating action of: the inflowing molten metal when. the same is poured. I i I A further object is to provide means which will. accomplish the, above stated purpose without the necessity for. using chaplets to support the core bar at intervals, Chaplets being necessarily left embeddedin the wall of the casting, the meansherein employed being designed to be readily attached to flask sec.

tions, such asare in use in horizontal pipe casting operations, without the necessity of any alterations in the same, or the embodiments of, the inventionmay be readilyincorporated as an integral partof newcope and drag sections, without interfering in any manner with the present functions of the sa1'ne.fl A fulland complete understanding of the invention maybe obtained from a consideration of the,followingdetailed description, taken in, connection with theaccompanying drawings forming a part of this specification, it being understood that while the drawings show practical formsof the invention, the latter isnot to be confined to strict conformity with the showing thereof, but may be changedor modified, so as such changes or modificationsmark nomateri-al departure from the salient vfeatures of the invention, as

pointed out. in the appended claims.

In the drawings, in which similar reference characters designate corresponding parts throughout the several figures Fig. 1 isa longitudinal view, illustrating diagrammatically the principle involved in one, form of the invention;

Fig. 2 is; a similar View ofianother. form;

. Fig. 3 is a vertical longitud'inal' section through a double pipe moldingflask used in" the horizontal IIlGthOCl of casting and. show? ing a core bar-and core, supported therein by the improved means; I I I l v Fig. iszan enlarged end view of the same; fFig. 5 is atransverse sectional view there- 0 of Fig. 4:, theulpperj or cope section being removed and showing the ends of the core bars, used in a double flask, supported in the drag section by the improved means;

Fig. 7 is ahorizontal section taken on the line 77 of Fig. 5 F Fig. 8 is, a detail perspective of oneof the outer end supports for the core bars removed from the drag section of the flask; Fig. 9 is a similar view of one. 0t theinner plates removed from thecope section of the flask;

, I 10 is. adetail section showing the plates of Fig. 9. Fig. 11 is a. detail ner of mounting the set' screws carried by the perspective of one of I thewedgesused in connection with the outer supports; I l a p Fig. 12 is an end viewof a modlfied form of end support;

Fig. 6is a" plan view ofthe subject matter i Fig. 13 is a detail sectiontaken .on the line Fig. 14 is a detail perspective view of one of the core bar supporting members. shown in Fig. 12; l

. Fig. 15 is .a partial vertical longitudinal a s illustrated a cal in form, the cope being adapted to be snperimposed, in reverse relation, upon the drag, after the sand molds have been made therein, and the core bar 3, having the sand core thereon, has been placed in longitudinal positionwithin the same.

Each flask section is provided with end walls 4 of the form, shown (although many other forms may be employed), and a plurality of intermediate webs 5 spaced substantially equal distances apart throughout the lengths of the sections, said webs being preferably formed integrally therewith and serving to strengthen the structure and to hold the sand therein.

The end walls 4 are preferably inclined slightly, as shown in Fig.3, and are provided with a pair of lifting arms or trunnions 6 at each end of each section, one of said arms or trunnions being longer than the other to facilitate turning of the section, or inverting the same while suspended inthe looped ends of lifting cables. This feature is claimed in my Patent No. 1,557,072, dated October 13, 1925.

Adapted to be secured to the outer faces of each end wall 1 of the lower or drag section of the flask, is a cast metal bracket or plate 7 formed preferably of iron and partaking of the shape of the letter W, there being two V-shaped branches joined together and provided with an attaching flange'S located at its lower and'inner edge. The flange 8 is provided with a plurality of bolt openings 8 for the reception of set screws 8 which rigidly secure the brackets in position on the outer faces of the end walls 4. j

' Each arm of the V-shaped branches is provided with an elevated face or pad 10 formed integrally therewith, said pads extending upwardly andinwardly toward each other, each face being substantially at an angle of to a vertical plane through the axis of the core bar 39,- and substantially equidistant from the core bar axis. At the outer ends, each bracket 7 is provided with arcuate recesses 11, which are adapted to rest upon the aforesaid arms or trunnions 6, the latter being round in cross section, and thus strengthening the support of the bracket. The brackets 7 may, however, be otherwise held in position on the end walls,'as by welding or brazing the same, as will be readily understood. Thus the brackets are rigidly secured to the end walls,

so as to provide a rigid base for wedgesto be described. r

Tapered wedges 12 are adapted to be driven inbetween the active faces of the pads 10 and the adjacent extending ends 13 of the core bar 3, where the same project through the openings 4 formed in the end walls 1 of each ofthe flask sections, after the said core bar has been applied inposition, in a manner to be explained. When the wedges are so driven, they are tangential to the 'core bar, on opposite sides of the vertical plane passing through the axis of the core bar. The effect of driving each wedge individually is to move the core bar or create a pressure on the core bar in a line substantially at right angles to the face of pad 10, and hence at substantially 45 relative to the vertical plane through the core bar axis. Therefore, the effect of driving both wedges (which are of the same shape) an equal distance is the resultant of two lines of force each at 45 to the vertical plane through the core bar axis, that is,a directly upward lifting force or pressure on the core bar ends.

The transverse webs 5 next adjacent to the end walls 4 in the upper or cope sections, are each adapted to support a casting or plate 1 1 formed to fit transversely within the cope, and having the necessary semi-circular openings 15 formed in its lower edge to correspond with the openings 5 of the webs, and adapted to receive and accommodate the core bar and core, as clearly shown in Fig. 5 of the drawings. The lower outer corners of the plate 14 are cut away at an angle, as at 16, to fit against the abutting flanges 17 formed in both the cope and the drag and to thus receive additional support.

Located substantially over the centers of the openings 15 of the said plate are vertical 1y disposed slots 18, which are adapted to receive the tap screws or bolts 19 threaded into the adjacent web 5, the slots permitting of more readily assembling the plate in position after which the screws are tightened.

Outstanding slugs 20, formed integrally with the plate, are suitably apertured and threaded for the reception of set screws 21, arranged on opposite sides of the vertical plane which passes through the axis of the core bar and at equal acute angles to said plane (preferably 15), said screws 21 carrying swivelled heads 22 adapted to bear upon the'core bar, when turned inwardly, to hold the same down, and at the same time resist lateral movement thereof in various directions; The wedges 12 act to hold the ends of the core bar up and also resist lateral movement thereof in various directions, the wedges 12 and screws 21 together holding the core bar against any lateral movement at or adjacent to the points of contact. Deflection of the intermediate portion of the core bar in various directions may, however, be accomplished by proper manipulation of the screws 21 and wedges 12. Thus, deflection downwardly may be effected by driving both wedges 12 very hard, with the core bar initially in contact with both screws 21, and

deflection toward the gate may be accomthe drawings;

to form the mold therein and removed to the casting floor, the core bar 3' with the-core already formed thereon, is then "positioned in longitudinal alinement with thelower half of the mold in thedrag and lowered to rest upon the hard packed'sand within" the end pockets of the drag between theendwalls and the first webs. The cope withthe complementary half of the mold formed therein is then lowered into position, the flanges '17 abutting entirely around the two members andsupporting the weight of theupp'er section, and the cope and thedrag are locked together. The set screws 21 arethen turned 'to' contact' tightly with the core bar, which may be 'readily done 'by removing a 'portion of thesand' over the innermost screws while the outer screws 21 may be easily reached through openings 23 formed in the walls of thecope section and the wedges 12*are then driven into position as describedfi One of the inner lugs 20 islonger than the other so as to s-ma offsetting ofone of the inner screws 21 relative" to the other, so thata wrench may-tighten said inner screws without interference, asclearly shown in Fig. Tot

By reference to "Fig. 1 of the drawings, it

will "be" seen thatthe force of the intlmving metal, as indicated by the arrow; tends to raise or float the intermediate portion of the core bar where unsupported within the mold,

- even though said bar be of alargediameter i and su'fiicientlystiff to support its own weight without perceptible sagging} i This upw ard tendency of the "intermediate portion is directed against the setscrews which constitute abutinents 22f,as indicated in Fig. 1 and the result is i that h the outer end' portions of the bar where projecting beyond the abutments are forced to actas levers imparting a downward tendency tothe endsofthe bar,b'ut

this downward tendency isefi'ectively resisted by the wedges 12, with the result that after pouring the baris coaxialwith the mold, and thus asub'stafntially uniform thiclmess of the wall ofthe casting is assured. 1

Where smaller diameter core bars are used, which" might sag by their own weight, double sets of wedges 12 anddouble sets of abutments 22 may be employed, as indicated in Figures 2 and 15; it being readily understood that the arrangen'lent's" already described maybe duplicated in, both the copeand the drag sections for this last-named purpose, to coun teract both the upward pressure of the molten iron andthedownwardefleetsof sagging, as indlcatedby the arrows in Fig. 2; i

The heads 22 of theset screws are opposite thecoa'ct ng wedges, as Sl10W111I1 Fig. ,4, and thus the core bar-bending action of the molten metal is resisted in allfdirections, andthis resistance is essentiahinasmnch as in pouring the} molten metal in double flasks; such as illustratedin the drawing, the: said metal enters in centrally disposed "sprue holes or gates arranged in a longitudinal series, one for each pocket between the webs 5, and then passes through laterally disposed gates to the ,molds at different points along their lengths,

that the metal tends also to-force thecore 7 "endslfi'l-"of the core bar, said seats being) elevated" above the cut-out portions at of the end wall-4 of the lower or drag section 2, asindicated by the dotted lines of Fig. 12. Such plateshnay be usedto adapt oldtypes of flasks for use with the core'bar holding means of thewinvention. WVhen making such an adaptation, holesare drilled in the end wall of the drag, and these holes are then tapped for screws or bolts. Because of possible in accuracies in'the location of these holes, the plates 2 1 have slots 26 through which bolts '27 pass, the slots 1 permitting adjustment of each plate prior to being secured infinalposition, wherein the core bars will be supported coaxial with the mold; When adjustmentof each plate has been made, the bolts 27 will be tightened) To obviate movement of the platesythey-will then be drilled, the rdrill holes'extending intothe end wall 4, and dowel pins 28' will be driven in the holes,thus making permanent the adjusted position of the plates; Further to insure rigidity: of the plates,they areprovided with arcuate seats 29 adapted to rest'upon thc'aioresaid trunnions or arms 6. The tormofFigs. 12,13

and let is specifically claimed in a division of It will. also be seen that the form of the invention illustrated in Figures 2 and 15, provides core 'bar supporting and deflecting means which makes possible a deflection of the central part of thecorebar in any lateral direction, seas-to resist the floating and sidewise deflecting action of the molten iron'and make possible the production of nearly perfect {castings in spite of suchaction. The form of the invention illustrated in Figures 1 and 39 inclusive makes possible a directly downward deflection of the central part of the core bar, or a deflection downwardly on a line substantially at 45 to and on either side of the vertical plane passing through the core bar axis, or a deflection along a line between these, but does not permit any upward or directly sidewise deflection as in the case of the other form mentioned (Figures 2 and 15).

What is claimed is 1. In means for supporting a core bar in a flask without the use of chaplets, outer supports beneath the bar at the ends thereof, inner abutments bearing on top of the bar adjacent to and spaced from said supports, and wedges adapted to be inserted between the sides of the bar and the supports to press the bar against the abutments and thus resist any upward movement of the intermediate portion of the bar responsive to the floating action of the molten metal.

2. In molding flasks, a core bar having a core thereon, a pair of spaced end supports carried by each end of the drag section of the flask to support the weight of the core bar, and apair of spaced abutments carried by each end portion of the cope section of the flask and contacting with the core bar in longitudinal spaced relation to said supports, the two supports and the two abutments together resisting movement of the core bar in a radial direction.

3. In means for supporting a core bar in a flask for casting pipe or the like, outer pairs of supports adapted to bear beneath and on top of the core bar at the ends thereof, and inner pairs of abutments adapted to bear beneath and on top of the core bar in spaced relation to the supports, the supports and abutments resisting movement of the intermediate portion of the core bar in any direction, said supports and said abutments contacting with the core bar beyond the ends of the core.

4. In means for supporting a core bar in a flask for casting pipe or the like, upper and lower members carried respectively by the cope and drag sections of the flask and located adjacent to the ends of the core bar, wedges interposed between the members and the core bar to grind the core bar, and upper and lower abutments carried respectively by the cope and drag sections and contacting with the bar near the members to resist movement of the intermediate portion of the core bar.

5. Means for supporting core bars in flasks, comprising a combined bottom and side core bar support adjacent to each end of the flask, and an abutment bearing on the top and sides of the bar and spaced at a distance from the lower support to constltute a fulcrum when the pressure of the inflowing iron causes the terminal portion of the bar to act as a lever and to resist side movement as well as upward -movement of the central portion of the bar.

6. Means for supporting core bars in flasks, comprising combined bottom and side supports located adjacent to the ends of the bar, and abutments bearing on the upper portion of the bar at a distance from the supports to constitute fulcrums when the pressure of the inflowing iron causes the terminal portions of the bar to act as levers, the supports and abutments then resisting side or upward movements of the central portion of the bar.

7. Means for supporting a core bar in a flask comprising upper and lower coacting core bar clamping means located near the ends of the flask, and upper and lower opposed abutments bearing on the bar in spaced relation to said clamping means.

8. Means for supporting a core bar in flask comprising upper and lower coacting corebar clamping means located near the ends of'the flask, and upper and lower opposed abutments located within the flask and bearing on the bar in spaced relation to said clamping means, said abutments lying in substantially the same plane and being adjustable toward the bar to clamp it.

9. Means for supporting core bar-s in flasks without the use of chaplets comprising brackets adapted to be secured to the outer faces of the end walls of the lower or drag section of the flask, each bracket having opposed faces for the reception of wedges to bear against the undersides of the projecting ends of the core bar and constituting supports therefor, plates adapted to be secured in the upper or cope section of the flask, and

adjustable set screws mounted in said plates ports to resist rising of the intermediate portion of the bar by the floating action of the molten metal.

10. Means for supporting core bars in flasks without the use of chapletscomprising brackets adapted to besecured to. the ends of the drag sections of flasks, each of said brackets having opposed faces below and substantially equidistant from the longitudinal axis of the core bar and inclined relative to the vertical, wedges adapted to be driven in between the faces and the projecting ends of the core bar to support the same, plates adapted to be secured to one of the transverse webs of cope sections of flasks, said plates having opposed lugs arranged above the axis of the core bar, and set screws mounted in the lugs so as to be inclined relative to-the vertical on opposite sides of said axis and adapted to bear down on the core bar adjacent to the sup ports to resist bending of the core bar through the action of the incoming metal.

11. Means for supporting, without the use of Chaplets, core bars in flasks, composed of lower or drag sections and upper or cope seetions, said meanscomprisingbrackets adapt ed to be" secured to the outer faces of theend walls of the drag sections and having a pair of'pads or faces each arranged at anangle of substantially 45 to the vertical plane pass ing through. the axis of the core bar and below the same, other brackets adapted tobe transversely secured in the copesections in spaced relation tothe pads or faces andhaving lugs.

, core bar in opposition to the set screws to retions. said means comprising brackets adapt .sistivertical or lateral movement ofthe bars.

12. Means for supporting, without the use of chapi'ots, core bars in flasks composed oflower or drag sections and upper or cope seced to be secured to the outer faces of the end walls of the drag sections and having a pair of pads or fifaces arranged at angle to the vertical plane passing through the axis of the core bar and on opposite sides of said axis, and wedges adapted to be driven in between said pads or faces and the core bar to resist vertical or latcn'almovement' of the bar.

13. Means for supporting core bars in flasks without the use of chaplets comprising brackets transversely mounted in the cope section and having lugs, and set screws mounted in said lugs at an angle to the vertical plane passing through the axis of the core bar and adapted to bear with their ends on the core bar.

14. 'Means for supporting core bars in flasks without the use of chaplets comprising brackets transversely mounted in the cope section and having lugs, some of said lugs being larger than others, and set screws mountedin said lugs so as to be movable substantially radially of the core bar into contact with the periphery thereof, the different sizes of the lugs permitting placing of adjacent set screws indifferent planes so that they may be tightened without interference.

15. In means for supporting core bars in flask sections, wedge seats carried on the outer faces of the ends of the drag, said seats being arranged at opposite angles beneath and in spaced relation to the core bar, wedges adapted to be. driven inwardly and downwardly between the seats and the core bar to support and resist side movement of the core.

16. In means for supporting core bars in flask sections, wedge seats carried on the outer faces of the ends of the drag, said seats being arranged at opposite angles beneath and in spaced relation to the core bar, wedges adaptedto be driven inwardly and downwardly between the seats and the core bar to support and prevent slde movement of the core, lugs plane.

carried by the cope in spaced relationito the ends thereof and in spacedirelation to the core bar, and set screwsthreaded through the lugs and directedinwardly and downs; wardly at opposite angles to bear-on the core,

bar and hold the core bar down upon the supporting wedges and resist side'movement of the core bar.

17 A flask vfor cast iron pipeand the like comprising,in combination, a cope; a drag; means for securing the cope and drag together; a core bar whose ends proj ect'beyond': the ends of the flask the drag,when rammed,

having areas of hard packed molding sand affording initial and practically unyielding supports for the end portions of the-core bar so as to hold it spaced from" the mold and obviate injury thereto; adjustable means interposedbetween the drag and the core barv and bearing on the core'bar, from the underside. nearv each end; and adjustabletmeans v bearing on the upper side of thecore bar at points spaced from each end;. said adjust able means, when tightened against the core bar, together supporting the core in bar inde pendently of the areas of molding sandand deflecting said bar intermediately.

18. A flask for east ironpipeand the like.

comprising, in; combination, a cope;v a drag; means for securing the cope and drag together; a core bar whose ends project beyond the ends of the flask; a set of adjustable means bearing on the core bar from the undersidenear each end; and a-set of adjustable means bearing on the core bar from the upper side spaced from each end; each of said adj ustable means movable independently of the others so as to bear against the core bar in a line which extends at an acute angle to the vertical plane which passes through the longitudinal axis of the core bar, the two members being symmetrically arranged relative to said vertical plane so that equal movement of the 19. A flask comprising, in'combination, a cope and a drag; a bracket secured upon the end Wall of the drag; an adjustable member carried by the bracket and contacting with the core-bar to exert pressure on the core bar along a line which makes an acute angle with the vertical plane passing through the longi: I

tudinal axis of the core bar; a projection integral with the end wall of the'drag and to one side of and beneath the core bar; the bracket being formed soas to fit against said projection so that deflection of the bracket due to the reaction from the adjustable member is eliminated and the bracket provides a rigid support.

20. A flask having core bar supporting and deflecting means comprising a set of four adjustable core-bar-contacting members near each end of the flask and carried thereby, and another set of four adjustable core-bar-contacting members near the first set, but more removed from the end of the flask.

' 21. A flask having core bar supporting and deflecting means comprising a set of four adjustable c'ore-bar-cdntacting members near each end of the flask and carried thereby, and another set- 0f four adjustable core-barcontacting members near the first set but more removed from the end of the flask; each member of each set being so adjustable as to exert pressure against the core bar along a line at 45 to the vertical plane passing through the longitudinal axis of the core bar.

22. A flask carrying a plurality of corebar-contacting elements all of Which are capable of exerting pressure laterally on the core bar, said element cooperating to deflect the intermediate portion of the core bar laterally in any desired direction.

23. A flask for casting tubular articles comprising, in combination, means on the flask near each end for gripping a core bar at points spaced from its ends and providing effectually fulcrums on Which the intermediate portion of the core bar may rock; and two sets of adjustable core-bar-contacting elements carried on the flask outside of the aforesaid means and nearer the ends of the core bar; said core-bar-contacting elements being capable of deflecting the intermediate contacting elements carried on the flask inside of the aforesaid means and spaced from the ends of the core bar; said core-bar-contactmg elements being capable of deflecting the intermediate portion of the core bar lat erally in any desired direction When the core bar is properly gripped by the means aforesaid.

Signed at Birmingham, Alabama, this 17th day of March, 1928.

JAMES R. MclVAN'E. 

